Table 3.
Major thickness measurements in OCTA between the RE and controls.
| RE | Control | p | |
|---|---|---|---|
| SVP + DVP in the macular area: ILM–RPE (μm) | |||
| Whole image mean thickness (μm) | 293.86 ± 17.12 | 296.08 ± 10.74 | 0.425 |
| Foveal thickness (ring diameter = 1 mm) (μm) | 241.93 ± 23.70 | 244.95 ± 19.75 | 0.476 |
| SVP in the macular area: ILM–IPL | |||
| Whole image GCC mean thickness (μm) | 97.86 ± 9.85 | 101.05 ± 5.88 | *0.044 |
| Superior GCC thickness (μm) | 95.74 ± 8.05 | 97.76 ± 5.71 | 0.143 |
| Inferior GCC thickness (μm) | 94.23 ± 10.35 | 97.70 ± 5.20 | *0.033 |
| FLV (%) | 1.52 ± 2.64 | 0.81 ± 0.82 | 0.065 |
| GLV (%) | 4.31 ± 5.36 | 1.96 ± 1.84 | *0.003 |
| Foveal thickness (ring diameter = 1 mm) (μm) | 48.87 ± 9.08 | 51.71 ± 8.60 | 0.101 |
| Parafoveal thickness (ring diameter = 3 mm) (μm) | 103.29 ± 13.45 | 107.65 ± 6.81 | *0.038 |
| Perifoveal thickness (ring diameter = 6 mm) (μm) | 97.32 ± 10.65 | 100.93 ± 6.54 | *0.038 |
| DVP in the macular area: IPL–OPL | |||
| Whole image mean thickness (μm) | 48.87 ± 9.08 | 48.87 ± 9.08 | 0.185 |
| RPE–BRM mean thickness (μm) | 9.87 ± 2.21 | 11.22 ± 4.12 | *0.049 |
| Peripapillary RNFL (μm) | 113.74 ± 17.31 | 117.40 ± 17.82 | 0.290 |
| Sub-foveal choroidal thickness (μm) | 262.22 ± 64.56 | 290.48 ± 69.52 | *0.039 |
RE, radiation encephalopathy; SVP, superficial vascular plexus; DVP, deep vascular plexus; ILM, internal limiting membrane; RPE, retinal pigment epithelium; IPL, inner plexiform layer; GCC: ganglion cell complex, includes retinal nerve fiber layer, ganglion cell layer, and inner plexiform layer; FLV, focal loss volume, the sum of fractional deviation in the region where there is significant focal loss (pattern deviation more than 1.65 standard deviations below the normal average); GLV, global loss volume, the sum of fractional deviation in areas where fractional deviation is negative; OPL, outer plexiform layer; BRM, Bruch's membrane; RNFL, retinal nerve fiber layer. RNFL thickness, GCC thickness, FLV, and GLV were measurements in retinal ganglion cells assessment.
p < 0.05.